Angelica dahurica (A. dahurica) root is a famous edible medicinal herb that has been used in China for thousands of years. To date, more than 300 chemical constituents have been discovered from A. dahurica. Among these ingredients, coumarins and volatile oils are the major active compounds. Moreover, a few other compounds have also been isolated from the root of A. dahurica, such as alkaloids, phenols, sterols, benzofurans, polyacetylenes and polysaccharides. Modern pharmacological studies demonstrated that the root of A. dahurica and its active components displayed various bioactivities such as anti-inflammation, anti-tumor, anti-oxidation, analgesic activity, antiviral and anti-microbial effects, effects on the cardiovascular system, neuroprotective function, hepatoprotective activity, effects on skin diseases and so on. Based on these studies, this review focused on the research publications of A. dahurica and aimed to summarize the advances in the traditional uses, phytochemistry and pharmacology which will provide reference for the further studies and applications of A. dahurica.

/pdf/the-angelica-dahurica-a-review-of-traditional-uses-24bzp4xv.pdf

The Angelica dahurica: A Review of Traditional Uses, Phytochemistry and Pharmacology

Angelica dahurica belongs to the Apiaceae family, whose dry root is a famous traditional Chinese medicine named as "Bai zhi". There are two cultivars (A. dahurica cv. 'Hangbaizhi' and A. dahurica cv. 'Qibaizhi'), which have been domesticated for thousands of years. Long term artificial selection has led to great changes in root phenotypes of the two cultivars, and also decreased their adaptability to environment. We proposed hypothesis that the cultivars may have lost some of the genetic diversity found in the wild species and may be highly differentiated from the latter during the domestication process. However, few studies have been carried out on how domestication affected the genetic variation of this species. Here, we accessed the levels of genetic variation and differentiation within and between wild A. dahurica populations and two cultivars using 12 microsatellite markers.The results revealed that the genetic diversity of the cultivars was much lower than that of wild A. dahurica, and A. dahurica cv. 'Qibaizhi' had lower genetic diversity compared to A. dahurica cv. 'Hangbaizhi'. AMOVA analysis showed significant genetic differentiation between the wild and cultivated A. dahurica populations, and between A. dahurica cv. 'Hangbaizhi' and A. dahurica cv. 'Qibaizhi'. Results from Bayesian, UPGMA, NJ and PcoA clustering analysis indicated that all 15 populations were assigned to two genetic clusters corresponding to the wild and cultivated populations. Bayesian clustering analysis further divided the cultivated populations into two sub-clusters corresponding to the two cultivars.Our study suggests that the domestication process is likely the major factor resulting in the loss of genetic diversity in cultivated A. dahurica populations and in significant genetic differentiation from the wild populations due to founder effect and/or artificially directional selections. This large-scale analysis of population genetics could provide valuable information for genetic resources conservation and breeding programs of Angelica dahurica. 

/pdf/limited-genetic-diversity-and-high-differentiation-in-j632si9s.pdf

Limited genetic diversity and high differentiation in Angelica dahurica resulted from domestication: insights to breeding and conservation

Wuzhimaotao (Radix Fici Hirtae) originates from the dry root of Ficus hirta (Moraceae), which is widely known as a medical and edible plant distributed in South China. As the increasing demand for Wuzhimaotao, the wild F. hirta has been extremely reduced during the past years. It is urgent to protect and rationally develop the wild resources of F. hirta for its sustainable utilization. However, a lack of genetic background of F. hirta makes it difficult to plan conservation and breeding strategies for this medical plant. In the present study, a total of 414 accessions of F. hirta from 7 provinces in southern China were evaluated for the population genetics using 9 polymorphic SSR markers.A mean of 17.1 alleles per locus was observed. The expected heterozygosity (He) varied from 0.142 to 0.861 (mean = 0.706) in nine SSR loci. High genetic diversity (He = 0.706, ranged from 0.613 to 0.755) and low genetic differentiation among populations (G'ST = 0.147) were revealed at population level. In addition, analysis of molecular variance (AMOVA) indicated that the principal molecular variance existed within populations (96.2%) was significantly higher than that among populations (3.8%). Meanwhile, the three kinds of clustering methods analysis (STRUCTURE, PCoA and UPGMA) suggested that the sampled populations were clustered into two main genetic groups (K = 2). Mantel test showed a significant correlation between geographic and genetic distance among populations (R2 = 0.281, P < 0.001). Pollen flow, seed flow and/or geographical barriers might be the main factors that formed the current genetic patterns of F. hirta populations.This is a comprehensive study of genetic diversity and population structure of F. hirta in southern China. We revealed the high genetic diversity and low population differentiation in this medicinal plant and clarified the causes of its current genetic patterns. Our study will provide novel insights into the exploitation and conservation strategies for F. hirta. 

/pdf/high-genetic-diversity-and-low-population-differentiation-of-1dr4cs6w.pdf

High genetic diversity and low population differentiation of a medical plant Ficus hirta Vahl., uncovered by microsatellite loci: implications for conservation and breeding

Angelica glauca Edgew. – A comprehensive review

The Varroa destructor is an ectoparasitic mite and the most serious biotic threat to honey bee and apiculture worldwide. Genetic types of V. destructor determine its ability of transmission and pathogenicity. Population genetics tools could supply useful information for comprehensive management of the mite. In this study, transcriptome information of V. destructor was analyzed for mining more polymorphic microsatellite markers for the population genetics investigation with further experimental verified. A total of 83,711 unigenes were assembled with the N50 length of 1,826 bp and the GC content of 40.03%. A total of 27,775 potential microsatellite loci were identified in 18,563 unigenes. The di-nucleotide and mono-nucleotide were most abundant repeat motifs and the most dominant di-nucleotides and mono-nucleotide repeat motifs were A/T and AT/TA. Forty-two of sixty randomly selected microsatellite loci were successfully amplified. Six of them were confirmed to be polymorphic in five V. destructor geographical populations. Our result showed transcriptomic data provide valuable resources for molecular marker development, and these novel microsatellite loci would be valuable in facilitating population genetic and evolutionary of V. destructor and related species.

Development and characterization of six novel microsatellite markers for honey bee parasitic mite Varroa destructor (Mesostigmata: Varroidae)

Angelica dahurica (Apiaceae) is an important herb in traditional Chinese medicine. Because of its important medicinal and economic values, its wild resources were over-exploited and increasingly reduced. Meanwhile, the diversity of cultivars of A. dahurica has decreased as a result of long-term artificial cultivation. However, there are no population genetics studies of natural A. dahurica reported yet, especially for using microsatellite markers (SSRs) to investigate population genetics of the species. Sixteen polymorphic EST-SSR loci were isolated from A. dahurica with transcriptome sequencing technology (RNA-Seq). The number of alleles varied from 2 to 15 per polymorphic locus over populations with the observed and expected heterozygosities ranging from 0.000 to 1.000 and from 0.000 to 0.829, respectively. Significant deviations from Hardy–Weinberg equilibrium were observed at 8 loci. Tests of linkage disequilibrium showed 11 informative locus pairs were significant across all populations. Cross-species amplification showed that 14 out of 16 SSR loci have the transferability in cultivar-A. dahurica cv. ‘Hangbaizhi’ and A. decursiva. The 16 newly developed loci microsatellite primers with RNA-Seq will be useful for further investigating population genetics of A. dahurica, cultivars and other members of this genus.

/pdf/development-and-characterization-of-16-novel-microsatellite-1enuwenrtl.pdf

Development and characterization of 16 novel microsatellite markers by Transcriptome sequencing for Angelica dahurica and test for cross-species amplification

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Limited genetic diversity and high differentiation in Angelica dahurica resulted from domestication: insights to breeding and conservation

Development and characterization of 16 novel microsatellite markers by Transcriptome sequencing for Angelica dahurica and test for cross-species amplification